| 13 - 5 = 8Duplicate Problem | 13 - 6 = 7Duplicate Problem | 13 - 7 = 6Duplicate Problem |
| 12 - 8 = 4Duplicate Problem | 12 - 9 = 3Duplicate Problem | 13 - 4 = 9Duplicate Problem |
| 12 - 5 = 7Duplicate Problem | 12 - 6 = 6Duplicate Problem | 12 - 7 = 5Duplicate Problem |